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Prepaid Expenses - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Prepaid expenses [line items] |  |
Tax advance of VAT and withholdings taxes | $ 12,500 | $ 12,700
Advance payments of taxes | 12,900 | 14,800
Tax credits | 13,200 | 11,500
Prepaid other | 19,896 | 33,524
GE Engines Services, LLC [member] |  |
Prepaid expenses [line items] |  |
Prepaid other | $ 4,000 | $ 20,000

X
- Definition Non-current income tax advance. + References No definition available. + Details
Name: | cpa_NoncurrentIncomeTaxAdvance
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other prepaid expenses. + References No definition available. + Details
Name: | cpa_OtherPrepaidExpenses
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Prepaid expenses. + References No definition available. + Details
Name: | cpa_PrepaidExpensesLineItems
Namespace Prefix: | cpa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax advance of VAT and withholdings taxes. + References No definition available. + Details
Name: | cpa_TaxAdvanceOfVATAndWithholdingsTaxes
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Tax credits. + References No definition available. + Details
Name: | cpa_TaxCredits
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cpa_GEEnginesServicesLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |